#include <iostream>
#include <queue>
#include <deque>
using namespace std;

int main()
{
    deque<int> mdeque(4, 20);
    queue<int> mque(mdeque);
    while (!mque.empty())
    {
        cout << mque.back() << (mque.size() == 1 ? "" : ",");
        mque.pop();
    }

    cout << endl
         << "hello" << endl;
    return 0;
}